Pretty cool Tom. Well done. Thanks!
Sent via iPhone
On Nov 11, 2019, at 5:58 PM, (Redacted sender stanfm for DMARC)
<dmarc-noreply@xxxxxxxxxxxxx> wrote:
Stunning, Tom. Thank you for such a great get.
Stan
-----Original Message-----
From: Tom Polakis <tpolakis@xxxxxxx>
To: az-observing <az-observing@xxxxxxxxxxxxx>
Sent: Mon, Nov 11, 2019 2:04 pm
Subject: [AZ-Observing] Mercury Transit Photos
I took this photo from a spot near 7th St. and Baseline Rd., specifically
chosen for it's good view of a ridge along South Mountain. It had to be
distant enough to be at infinity focus, but close enough to show definition
in the silhouettes of flora. Historic Aerials shows an orange grove at this
location in 1958; today, it's a field surrounded by big development. This
is a single frame taken with an SLR and a 4-inch refractor with a Herschel
wedge.
https://pbase.com/polakis/image/170031219
You can't see anything but the sun through a solar filter, so it was halfway
through sunrise before I was able to compose the sequence showing it rising.
The careful observer will see four frames of a hiker near the right edge of
the frame at the end of the movie.
https://pbase.com/polakis/image/170029894
From the backyard in Tempe, I used a Lunt 100 H-alpha scope, deliberately
single-stacked to best show the chromosphere as a layer along the rim, and
took sets of 500 video frames, having the software pick out the best 300 for
stacking. This is the end of the series, showing the egress of Mercury
across the chromosphere. Seeing was all over the place, as evidenced by the
large variations in sharpness from frame to frame.
https://pbase.com/polakis/image/170030824
Tom
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